Yu, Yan, compiler
Karez
Intercontinental Press, 2008
 Buku Teks
Ikeda, Daisaku, 1928-
Rendezvous with nature
Daisaku, 1990
 Buku Referensi
Koren, Henry J.
An introduction to the philosophy of nature
Duquesne University, 1960
 Buku Teks SO
Keanekaragaman flora anggrek (orchidaceae) di cagar alam gunung simoang, Jawa Barat=Floristic study on the orchids orchidaceae found in gunung simpang nature reserve, West Java
Pusat Penelitian Biologi, 2009
 Artikel Jurnal
Pinker, Steven
The blank slate : the denial of human nature / Steven Pinker
Penguin Books, 2002
 Buku Teks